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reports of injuries or damage, and we'll bring you more on the story as we get it. well, tens of millions of people are sweltering under oppressive heat waves in the united states. heat alerts stretch from florida to the pacific northwest and alerts for dangerous heat levels have been in effect for parts of arizona and texas for more than 30 days in a row. the heat wave could set more than 100 temperature records through monday. death valley, california, could top 130 degrees later today. right now, at 1:00 a.m. in phoenix, it's 105 degrees. now, according to data from the national weather service, heat kills more americans than any other type of severe weather and temperatures could get even worse, especially in the southwestern u.s. cnn's rafael romo has more on the story from las vegas. >> reporter: people here in las vegas are going to have to wait a few more days for a respite. the national weather service has issued an excessive heat warning for the city, expected to last until news evening.